Sanding machine



Feb. 17, 1942. w. L. DUCKER. JR

SANDING MACHINE Filed Oct. 25, 1940 2 Sheets-Sheet 1 1447/16/29 4,. Quaker L/h INVENTQR Feb. 17, 1942. I w. DUCKER, JR

SANDING MACHINE Filed Oct. 25, 1940 2 Sheets-Sheet 2 I W/ /Sm L. Quaker INVENTOR Patented Feb. 17, 1942 SANDING MACHINE William L. Ducker, Jr., Tulsa, Okla., assignor to Walter S. Koons, Tulsa, Okla.

Application October 25, 1940, Serial No. 362,842

Claims.

I The invention relates to sanding machines, and has for its object to provide a device of this kind which may be easily adjusted to various positions for sanding portions of furniture, particularly in cabinet shops by adjusting the machine in relation to the particular surface to be sanded.

A further object is to provide an adjustable sanding machine, which 'may be adjusted to sanding articles in various planes and constructed in a manner whereby the machine, when not in use, may be folded into a compact package for conserving space.

A further object is to provide a sanding machine comprising a standard having pivotally mounted, on the upper end thereof, a hinged bar movable in a vertical plane and a hingedly mounted endless sanding belt mechanism at one end of the bar and driven by a motor carried by the other end of the bar and counterbalanced by said motor.

A further object is to provide a belt and pulley drive between the motor and one end of the sander belt, said drive including an idle pulley connection on the pivoted point of the sander frame, and to provide means whereby the hingedly mounted motor supporting bar and the sander frame may be locked in various adjusted positions in relation to work to be sanded.

A further object is to provide a platen underneath one flight of the sander belt to form a backing for the sander belt when small pieces are being sanded.

A further object is to provide an adjustable side guard on the sander frame and adjustable in relation to the sanding surface of the sander belt for sanding articles having particular angles. Also to provide a protractor gauge in connection with said side guard.

' A further object is to pivotally connect the sander belt frame to one side of the motor frame so that when the machine is in folded position both of said frames may assume a position substantially in the same planevertically in relation to each other and to the supporting stand.

With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it

being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings:

Figure 1 is a side elevation of the sanding machine, showing the same folded into a compact conditionfor storage or shipping purposes.

Figure 2 is a side elevation of the machine, showing the machine adjusted for vertical sanding, for instance'of pieces held in the hand of the operator.

' Figure 3 is a side elevation of the machine showing the sanding belt frame adjusted relatively high for sanding the sides of an object, for instance case furniture.

Figure 4 is a view similar to Figure 3, but showing the sanding frame adjusted relatively low, for use as a vertical sander, rotated 180 from position shown in Figure 3.

Figure 5 is a side elevation of the machine showing in full and dotted lines the sanding frame adjusted for low horizontal work or high horizontal work.

Figure 6 is a detail view of a portion of the side guard and sanding table and the protractor used in connection therewith.

Figure 7 is a detail perspective view of the double groove idle pulley and portions of the motor frame and sander belt frame, showing the holding means for locking the parts in adjusted position.

Figure 8 is a detail perspective view of the supporting bracket for the motor frame and carried by the upper end of the stand support.

Referring to the drawings, the numeral l designates the weighted base of the stand and 2 the upright carried thereby. 'I'he sanding machine hereinafter set forth is supported by the upright 2 so it can be adjusted in a horizontal or a vertical plane for positioning the abrading elements according to the work to be performed.

Mounted on the upper end of the upright 2 is a contractible split sleeve 3, which may be adjusted upwardly or downwardly for supporting the sander. and motor carrying frame at various elevations according to the work.

Rotatably mounted at 4 on the upper end of the upright 2 and resting on the split sleeve 3 is a split sleeve 5, which sleeve is held in rotated adjusted position by the lock lever B, which contracts the sleeve for gripping the upper end of the upright. All of the sanding and sander drive mechanism is supported on the sleeve 5. One side of the split sleeve 5 is provided with spaced gripping lugs 1, between which lugs is gripped a headed rotatable shaft 8, which is in a horizontal plane, and the shaft is locked in various rotated positions by means of a lock lever 9 of conventional construction. The inner end of the horizontal shaft 8 is provided with a T in,

ing the split sleeve 5 and the spaced lugs 1, the

will be seen that work of two angles can be accomplished, one side against the side bar 33 and the other in cooperation with the sanding table 35.

Underneath a portion of one flight of the sander belt and anchored to the bracket 32 is a platen 36, which acts to form a backing for the sander belt, when small pieces being sanded in conjunction with the side bar 33 and the sanding table 35 are pressed against the abrasive side of the belt.

From the above it will be seen that a sanding machine is provided which may be folded into a motor carrying bar I I may be adjusted to various positions in a vertical and transverse, aswell as an inclined, plane, according to'theposition compact package for storage purposes and may be easily positioned adjacent work to be sanded yand' adjusted to sand any part of the work at an of the parts desired for sanding various articles. The other end of the motorsupporting'barj' II is provided With a contractible split sleeve la in which is clamped and held, by means of a hand wheel l9, a stub shaft 20.

The stub shaft is provided with a contractible split sleeve 2| inwhich is clamped the sander bar 22,- therefore it willbe seen that the sander bar may be moved to various positions in a vertical plane and may be held in said positions; two of said positions being shown in Figures 4 and 5. When the parts are in the position shown in Figure 4 various pieces of wood can be sanded on the sander belt 23, and when some of the parts, hereinafter set forth, are removed, such as pulley guards, the parts can be positioned as shown in Figure 3 for sanding the side of a chest of drawers or other case furniture. When the parts are adjusted tothe position shown in full lines in Figure 5, a table top canbe sanded, and during this sanding operation a carpeted pressure block can be held against the inner side of the flight of the. belt that is being used, in order to press the sanded side of the belt into contact with the work.

Rotatably mounted on the stub shaft 20 is a double groove idler pulley 24, which is driven by a V-type belt from the motor [3. The endless sander belt 23 is driven by a V-type belt 26,

which extends over one element of the double pulley 24 and over agrooved pulley 21 carried by one end of the sander bar 22, and having driving connections-with the pulley 28. The endless sander belt 23' extends over the pulley 28 and over the idle pulley 29 carried by the other end of the sander bar 22, therefore it will be seen that-when the motor [3 is operated, the sander belt 23- is driven. The idle pulley 29 is preferably carried by an adjustablesleeve 33 on the bar 22 r' so the belt can be tightened as desired. The sander bar also supports pulley guards 3|, preferably mounted, in a manner so they can be removed when sanding the sides or tops of case furniture.

Adjustably mounted on the sander bar 22 by means of brackets 32 is a parallel side bar 33 which may be adjusted at various angles in relation to the adjacent sander belt flight for en-. gaging pieces of wood to be sanded having faces at different angles. One supporting bracket 32 is provided with a protractor bracket 34 adjacent one end of the side guard 33 and adapted to carry a normally horizontal sanding table, which is adjustable to various angles, for small work held in the operators h'and. This sanding table is sometimes called a butt sanding guide, and is principally used for bevelling ends. Thus it angle. The device is particularly adapted for use in furniture factories and cabinet shops wh'ere furniture is sanded and refinished, and one that can be stored in a comparatively small space when not in use.

The invention having been set forth, what is claimed as new and useful is:

1. A portable sanding machine comprising a base, an upright carried by said base, a motor and sander belt frame supporting bar universally connected to the upper end of the upright and adapted to be held in various adjusted positions, said motor bar being universally connected to the upright intermediate the ends of said motor bar, a drive motor carried by one end of the motor bar, an endless sander belt carrying bar h'ingedly and axially adjustably connected to the other end of the motor bar, an endless sander belt carried by the sander bar and means for drivingsaid sander belt from the motor at the other end of the motor bar.

2. A device as set forth in claim 1 including pulleys at the ends of the sander belt bar and over which the sander belt extends, an idle pulley at the point of connection of the sander belt bar to the motor bar, a belt drive connection between. the motor and the idle. pulley and a belt drive connection between the idle pulley and one of the sander belt drive pulleys.-

3. A device as set, forth in claim 1 wherein the connection between the upright and the motor bar comprises a stub' shaft carried by the motor bar, a contractible sleeve carried by the upright, means for clamping the stub shaft in various positions and to the sleeve, and means for clamping the sleeve to the upright in various positions in a horizontal plane.

4. A device as set forth in claim 1 wherein the drive connection between the motor and the sander belt comprises a stub shaft carried by the sander bar, a clamping member carried by one end of the motor bar and clamped to the stub shaft, a double idle pulley rotatably mounted on the stub shaft, a belt drive connection between the idle pulley and the motor at the other end of the motor bar, a belt drive pulley at one end of the sander bar, a belt drive connection between the idle pulley on the stub shaft and the belt drive pulley and an idle pulley at the other end of the sander bar and over which the sander belt extends.

5. A device as set forth in claim 1 wherein the motor bar is supported intermediate its ends and the sander bar and its mechanism is counterbalanced by said motor.

WILLIAM-L. DucKER, JR. 

